bigmster127,
I have shot the HHA single pin for years. It is the same process to set up as a pin sight. You set your first distance and mark it. Move the slide and dial in your second distance, mark it. Same with the third distance etc. You must move the slide to the distance you want to shoot.
You can easily adjust the left and right. I wait to adjust the left and right at 30 or 40 yards. Anything less is too close to give you an accurate reading on being left or right.
I personally do well with the single pin and have no problems remembering to move the sight to the correct distance. For whatever reason, I can not use a pin sight. I go the first pin and shoot. I guess that has to do with being blonde.
The sight is very durable, it has been all over the world with me hunting and I have never had a problem with it.
Hope this helps!
Take Care and Shoot Straight!
Jayne